The Kramer VM-4HD is a professional 3G HD/SD-SDI distribution amplifier designed to reliably split a single SDI signal into multiple identical outputs. It supports a wide range of SDI formats, including SD, HD, and 3G-SDI, making it suitable for broadcast studios, live production environments, post-production facilities, and professional AV installations where signal integrity is critical.

Built with Kramer’s re-clocking and equalization technology, the VM-4HD ensures stable signal transmission over long cable runs while minimizing jitter and signal degradation. Automatic cable equalization compensates for signal loss, allowing consistent performance even when using extended SDI cables. This makes the unit dependable for demanding workflows that require precise and synchronized video distribution.

The compact, fanless design allows the VM-4HD to operate quietly and fit easily into racks, desks, or mobile production setups. Its robust metal enclosure and simple plug-and-play operation make it a practical solution for both permanent installations and portable systems where reliability, compact size, and professional signal handling are essential.